US3301910A - Production of trichloroethylene and tetrachloroethylene - Google Patents

Production of trichloroethylene and tetrachloroethylene Download PDF

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Publication number
US3301910A
US3301910A US344104A US34410464A US3301910A US 3301910 A US3301910 A US 3301910A US 344104 A US344104 A US 344104A US 34410464 A US34410464 A US 34410464A US 3301910 A US3301910 A US 3301910A
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reaction
acetylene
solution
tetrachloroethylene
trichloroethylene
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US344104A
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Tiganik Leonhard
Ohlson Jan Sven Ragnar
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Uddeholms AB
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Uddeholms AB
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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C17/00—Preparation of halogenated hydrocarbons
    • C07C17/013—Preparation of halogenated hydrocarbons by addition of halogens
    • C07C17/02—Preparation of halogenated hydrocarbons by addition of halogens to unsaturated hydrocarbons

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  • ATTORNEYS 3,301,910 PRODUCTION OF TRICHLOROETHYLENE AND TETRACHLOROETHYLENE Leonhard Tiganik, Skoghall, and Jan Sven Ragnar Ohlson, Karlshamn, Sweden, assignors to Uddeholms Aktiebolag, Uddeholm, Sweden, a company of Sweden Filed Feb. 11, 1964, Ser. No. 344,104 Claims priority, application Sweden, Feb. 22, 1963, 1,978/ 63 6 Claims. (Cl. 260-654)
  • the present invention relates to a method for the production of trichloroethylene and tetrachloroethylene by a reaction between copper chloride and acetylene.
  • Trichloroethylene and perchloroethylene are compounds that have been known for a long time and are produced on an industrial scale, usually with acetylene and chlorine as raw materials.
  • the first step in the production of trichloroethylene is the production of tetrachloroethane, which is obtained by addition of chlorination of acetylene with chlorine.
  • the tetrachloroethylene is then treated with lime or thermally cracked. As a by-product is obtained calcium chloride or hydrogen chloride respectively.
  • Tetrachloroethylene is produced from trichloroethylene by reaction with pentachloroethane or by direct.
  • German Patent Specification No. 1,011,414 which refers to a method for producing 1,1-dichloroethylene and trans-1,2-dichloroethylene by reaction between acetylene and hydrogen chloride in the presence of cupric (II) and cuprous (1) ions in a ratio of from 1:4 to 1:9. It is also known to produce vinylchloride, dichloroethylenes, monovinylacetylene, etc., from acetylene, hydrogen chloride and copper chlorides. It is common for all these known methods to work in strongly acidic solutions and with a high content of enprous (I) ion in relation to cupric (II) ion.
  • the l-valent copper may be oxidized to 2-copper with chlorine or with hydrogen chloride and oxygen, for instance in the manner described in German Patent No. 1,094,734 and Swedish Patent No. 178,849.
  • the possibility of utilizing hydrogen chloride as a chlorine source is .valuable, as hydrogen chloride is obtained as a by-product in many chlorination reactions.
  • Trichloroethylene and tetrachloroethylene are formed at a rate, which depends upon the acidity of the solution and its content of cupric ions.
  • a rate which depends upon the acidity of the solution and its content of cupric ions.
  • a pH value of 1-2.5 and at a content of cupric ions which is Patented Jan. 31, 1967 ICC - 70-100 mole percent of the total copper content of the reaction solution.
  • the most favorable range for the formation of t-richloroethylene seems to lie at 70-90, and
  • the reaction can be carried out batchwise as well as continuously.
  • the reaction solution is charged in a reactor and the acetylene is introduced at a temperature of at least 60 C., suitably -130 C., in which case a pressure vessel is not needed.
  • the reaction rate can be increased by increasing the temperature above C. and operating in a pressure vessel.
  • the reaction rate can be further increased by supplying the acetylene at such a rate as to produce in the reaction chamber a pressure which is higher than the pressure of saturated steam at the reaction temperature.
  • the cupric chloride is reduced to cuprous chloride While the acetylene is chlorinated.
  • the reaction products gradually leave as vapours as they are formed.
  • the latter may be desirable, when working continuously and in the range, where the cupric ion content in relation to the cuprous ion content is so high, that the formed cuprous chloride is held in solution by the chloride ions present. It is thus important for the technical realization of the reaction that the chloride ion content is high. Which cation to use for accomplishing this seems to be of a lesser importance.
  • Carbon dioxide was introduced for purging air out of the apparatus, Where- 'after the reaction was started by introducing acetylene (10 litres per hour). The pH of the solution was :23 at the start. (pH dropped to 0.9 during the reaction.) The formed reaction products and the distilled water was collected in a tube in a deep freeze-bath at -60 C. The test tube was exchanged each 15 or 30 minutes and the reaction products were Weighed and analyzed by means of a gas-chromatograph and an lR-spectrophotorneter. The results are listed in the following table.
  • Example 2 This test was carried out in the same apparatus and in the same manner as in Example 1 but the reaction solution contained only 510 g. (:3 moles) CuCl .2H O. pH was 1.7 at the start. Acetylene was introduced at a rate of litres per hour. The test could only be continued to a degree of reduction of based on the amount of charged CuCl as at this degree of reduction CuCl starts to precipitate.
  • Example 4 This test was carried out with a continuous feed and removal of the reaction solution.
  • the reaction vessel Formed Reaction products in percent Mole per- Time interval, min. product, cent Cu g. at the end tritetra- 1,1- eistrans- Rem. of interval 5.
  • 55 48 32 1 0.1 13 7 88 12. 29 64 11 l 0. 1 12 13 75 13.83 53 1. 4 2 0. 1 29 14 12. 16 33 0.2 4 0. 1 46 17 ca. 55
  • Example 3 The test was carried out in a cylindrical container having a gas distributor in the bottom through which the acetylene was supplied and the leaving gases being passed from the top of the container to a condenser Where the reaction product was collected. After the condenser a manometer and a reducing valve were connected. In the container was charged 200 ml. Water solution conconsisted of a glass tube with a length of 660 mm. and a thickness of 50* mm. and having a heating coil. The acetylene was supplied through a gas distributor in the lower part of the vessel and the reaction products were allowed to distill off in the upper part of the tube. The fresh reaction solution was supplied at the bottom and the reacted solution flowed out through an over-flow in the middle of the tube.
  • the apparatus consists of a reactor I having an inlet at the bot-tom for the chloride solution supplied from a container 311, an inlet for acetylene and an over-flow for the solution.
  • the reaction product is dist th Shari; R lt 5 charged at the top of the reactor together with the un- Reaction products in percent Mole percent Cu Time Formed interval, min. product,
  • the PH of the S 01 ultion was L8 and its temperw and cuprous ions, 1n whlch the cupnc ions constitute ture 100 C.
  • Acetylene was supplied at a rate of 20 mole percent of the l coppel mamnormal litres per hour and was converted to a product t-ainmg the pH-value of the reaction solut1on at 1 to 3 and consisting of 81% (by weight) of trichloroethylene, 12% g s g f g g of i lezlislo h tetrachloroethylene and 7% trans-dichloroethylene.
  • the o accor 0 l i m W m total conversion acetylene was 97% chlorlde lOIl content in the solut1on is from 4 g.-atoms per litre up to a solut1on, which is saturated at the reaction Example 8 temperature.
  • the test was carried out continuously as in Example M h hccordlhg clahh 1 in which the amount 7 but the Solution Contained 5 moles of copper ch:10 of tcupric ions 15 kept at 70-100 mole percent of the total ride and 3 moles of lithium chloride per litre.
  • the copPeramountamount of Cu (I) was 15 mole percent of the total copper Method q to chum m which ihe solut1on amount the PH of the solution was L8 and its tempem besides copper chloride also contalns a water soluble chloture 100 C.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Catalysts (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
US344104A 1963-02-22 1964-02-11 Production of trichloroethylene and tetrachloroethylene Expired - Lifetime US3301910A (en)

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US (1) US3301910A (zh)
AT (1) AT247296B (zh)
BE (1) BE644182A (zh)
CH (1) CH448058A (zh)
DE (1) DE1215135B (zh)
DK (1) DK118014B (zh)
FI (1) FI40283B (zh)
FR (1) FR1383381A (zh)
GB (1) GB987553A (zh)
NL (1) NL6401568A (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3544642A (en) * 1964-08-20 1970-12-01 Uddeholms Ab Method for the production of trihalogenated and tetrahalogenated ethylene
CN112973594A (zh) * 2021-02-08 2021-06-18 宁夏普瑞化工有限公司 粗品碱洗吸收的反式-1,2-二氯乙烯制备系统

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2779805A (en) * 1952-06-11 1957-01-29 Olin Mathieson Separation of acetylene from ethylene by hydrochlorination of the ethylene
US2809221A (en) * 1952-06-11 1957-10-08 Olin Mathieson Selective chlorination
US2915565A (en) * 1953-09-25 1959-12-01 Knapsack Ag Process of preparing vinylidene halide
US3079444A (en) * 1957-12-27 1963-02-26 Knapsack Ag Method of preparing halogen-substituted aliphatic hydrocarbons
US3184514A (en) * 1958-04-22 1965-05-18 Knapsack Ag Manufacture of trans-1, 2-dihalogenoethylenes
US3197515A (en) * 1961-09-29 1965-07-27 Pechiney Prod Chimiques Sa Process for preparing dichlorethylene and mixtures thereof with vinylidene chloride

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2779805A (en) * 1952-06-11 1957-01-29 Olin Mathieson Separation of acetylene from ethylene by hydrochlorination of the ethylene
US2809221A (en) * 1952-06-11 1957-10-08 Olin Mathieson Selective chlorination
US2915565A (en) * 1953-09-25 1959-12-01 Knapsack Ag Process of preparing vinylidene halide
US3079444A (en) * 1957-12-27 1963-02-26 Knapsack Ag Method of preparing halogen-substituted aliphatic hydrocarbons
US3184514A (en) * 1958-04-22 1965-05-18 Knapsack Ag Manufacture of trans-1, 2-dihalogenoethylenes
US3197515A (en) * 1961-09-29 1965-07-27 Pechiney Prod Chimiques Sa Process for preparing dichlorethylene and mixtures thereof with vinylidene chloride

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3544642A (en) * 1964-08-20 1970-12-01 Uddeholms Ab Method for the production of trihalogenated and tetrahalogenated ethylene
CN112973594A (zh) * 2021-02-08 2021-06-18 宁夏普瑞化工有限公司 粗品碱洗吸收的反式-1,2-二氯乙烯制备系统

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Publication number Publication date
DK118014B (da) 1970-06-29
FI40283B (zh) 1968-09-02
CH448058A (de) 1967-12-15
BE644182A (zh) 1964-08-21
NL6401568A (zh) 1964-08-24
AT247296B (de) 1966-05-25
FR1383381A (fr) 1964-12-24
DE1215135B (de) 1966-04-28
GB987553A (en) 1965-03-31

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